Inter-station protection fault identification system and method based on information fusion

A fault identification and inter-station technology, applied in the fault location, fault detection according to conductor type, electrical components, etc., can solve the lack of consideration of engineering practicality and feasibility, poor adaptability of complex event processing ability, and unclear information sharing mechanism To achieve the effect of speeding up the action time of backup protection, solving the difficulty of setting the protection value, and simple communication mode

Inactive Publication Date: 2018-12-18
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current wide-area protection research is mainly aimed at the fixed grid structure, with relatively single functions, poor ability to deal with complex events and adaptability to changes in the operating environment
The industry has not yet reached a consensus on many issues regarding wide-area protection, such as whether to adopt a centralized or distributed system configuration mode, to locate faults based on electrical or logical quantities, to construct protection algorithms, etc., resulting in a huge amount of uploaded information, Problems such as complex information transmission mode and unclear information sharing mechanism
In addition, the research results mostly focus on theoretical analysis and simulation verification, and lack of consideration for engineering practicability and feasibility

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Inter-station protection fault identification system and method based on information fusion
  • Inter-station protection fault identification system and method based on information fusion
  • Inter-station protection fault identification system and method based on information fusion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0059] Build a model of Liupanshui, Guizhou on RTDS for simulation verification, the model simulation picture is as follows Figure 9 As shown, set up single-phase short circuit, phase-to-phase short circuit, three-phase short circuit, two-phase ground short circuit, developing fault and transfer at the exit, midpoint, and end of Line 1 at Station 3, and at the exit, midpoint, and end of subordinate lines. In case of a permanent fault, verify the wide-area protection function. The verification results are shown in Table 1.

[0060] Table 1 RTDS simulation results

[0061]

[0062]

[0063]

[0064]

[0065]

[0066]

[0067] The verification results show that the information fusion-based inter-station protection fault identification system and its method proposed by the present invention can accurately identify various inter-station faults, meet the requirements of rapidity, selectivity, and sensitivity of protection, and accelerate the backup protection act...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of electric power system fault recognition, and particularly relates to an interstation protection fault recognition system and method based on information fusion. The interstation protection fault recognition system based on information fusion is characterized by comprising a protection information uploading module, an interstation information interaction module and an information fusion action module which are connected in sequence; the protection information uploading module extracts distance protection and zero sequence current protection action messages on the basis of protection line interval output results; the interstation information interaction module calculates and sends interstation interaction information on the basis of the action messages uploaded by the information uploading module; the information fusion action module recognizes interstation faults according to the interstation interaction information and local protection action information. Accurate judgment results can be obtained for faults of various types, the protection performance is sensitive and reliable, the backup protection action time is shortened, and meanwhile the problem that protection fixed value setting is hard is successfully solved.

Description

technical field [0001] The invention belongs to the field of substation power system fault identification technology, and in particular relates to an information fusion-based inter-station protection fault identification system and a method thereof. Background technique [0002] With the access of large-scale new energy and the development of AC / DC hybrid EHV / UHV interconnected large power grids, staged protection using only local information is difficult to adapt to changing network structures and operating modes; at the same time, distributed The access of the power supply makes the distribution network change from a single-radiation network to a double-terminal or multi-terminal network. The distribution of power flow and the magnitude and flow direction of the short-circuit current during faults have fundamental changes. The original protection method based on fixed value setting has great limitations. , resulting in the sensitivity and selectivity of relay protection ca...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H02J13/00G01R31/08
CPCG01R31/085H02J13/00
Inventor 王增平马静孙吕祎林一峰
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products